Pre-anesthetic Ultrasonography of the Subclavian Vein and Inferior Vena Cava for Predicting Hypotension After General Anesthesia Induction in Patients Undergoing Abdominopelvic Surgeries: A Prospective Observational Study

BACKGROUND: Post-induction hypotension (PIH) jeopardizes vital organ perfusion and is associated with perioperative morbidity and mortality. This study aimed to evaluate and compare the diagnostic accuracy of preoperative ultrasonography (USG) measurement of the inferior vena cava (IVC) and subclavian vein (SCV) for predicting PIH following induction of general anesthesia (GA) in patients undergoing abdominopelvic surgeries. METHODS: A prospective observational study was conducted on 57 patients of North Indian ethnicity undergoing elective abdominopelvic surgeries. IVC and SCV diameters and collapsibility index (CI) were measured using USG before induction of GA. The study focused on comparing these measurements with the incidence of PIH. RESULTS: The IVC-CI (p